Infineon Technologies CY14B101LA-ZS45XI

Overview

CY14B101LA-ZS45XI from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, 45 ns access time, single 3.0 V (–10% to +20%) supply, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using an external capacitor on VCAP and supports software/hardware-initiated STORE/RECALL for data retention in mission-critical embedded control and metering systems.

For engineers reviewing the CY14B101LA-ZS45XI datasheet, CY14B101LA-ZS45XI pinout, CY14B101LA-ZS45XI application, or CY14B101LA-ZS45XI equivalent, key selection considerations include AutoStore timing dependency on VCAP capacitance, HSB-driven hardware STORE arbitration, ×8 vs ×16 configuration compatibility, and 1 million STORE endurance versus infinite SRAM read/write cycles.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 131,072 bytes without block addressing. The architecture decouples volatile operation from nonvolatile persistence: SRAM functions at full speed (tAA = 45 ns), while STORE/RECALL operations inhibit SRAM access and require dedicated timing windows (tSTORE = 20 ms max).

AutoStore activation relies on internal voltage monitoring of VCC against VSWITCH (2.5 V typ.), triggering capacitor-powered STORE when supply drops. Hardware STORE uses active-low HSB assertion, and software STORE employs address-based command sequences - all three methods converge on the same QuantumTrap write mechanism with identical 1 million cycle endurance limit.

Key Specifications

Pinout & Package

Package: 32-pin Small Outline Integrated Circuit (SOIC), 300 mil width, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nvSRAM applications.

Compared with CY14B101LA-ZS25XI, this 45 ns variant trades speed for lower dynamic power and relaxed timing margin; versus FM24V10-G, it provides autonomous power-loss STORE but requires VCAP and has finite STORE endurance - critical for infrequent, safety-triggered logging.

Availability

CY14B101LA-ZS45XI is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, and railway signaling systems requiring stable component supply, long-term lifecycle support, and guaranteed 20-year data retention.

Supply support for CY14B101LA-ZS45XI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains the nvSRAM portfolio with full technical and supply chain continuity.

This part belongs to the QuantumTrap nvSRAM product line, designed specifically for industrial and infrastructure applications where battery-free, high-reliability nonvolatile memory is required without compromising SRAM interface simplicity.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B101LA-ZS45XI requires a minimum 4.7 µF ±20% tantalum capacitor on the VCAP pin to guarantee successful AutoStore at VCC = 2.7 V and T = +85°C. Lower values risk incomplete STORE and data corruption. Ceramic capacitors are not recommended due to DC bias derating and insufficient energy storage.

Can HSB be left unconnected if only software STORE is used?

Yes - HSB is optional when using only software STORE or AutoStore. However, leaving HSB floating is prohibited; it must be pulled HIGH via ≥10 kΩ resistor to VCC to prevent spurious hardware STORE triggers caused by noise or leakage currents on the open-drain node.

Does RECALL occur automatically on every power-up, and can it be disabled?

Yes, RECALL executes automatically on every power-up and cannot be disabled. The device restores data from QuantumTrap to SRAM before releasing CE/OE/WE control lines, ensuring valid memory contents at reset release. No software intervention is needed or possible.

How does the part handle partial STORE operations during voltage droop?

If VCC collapses too rapidly or VCAP is undersized, the part aborts STORE and retains original SRAM data - no partial writes occur. QuantumTrap cells update atomically per byte; incomplete STORE leaves both SRAM and nonvolatile memory unchanged, preserving data integrity.